maths... binary operations...?
回答 (1)
2015-09-09 11:31 am
✔ 最佳答案
Ans: B｜x｜ = 1
x = 1 or -1
1 + (-1) = 0
But 0 doesn't in the set.
收錄日期: 2021-05-02 14:11:00
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https://hk.answers.yahoo.com/question/index?qid=20150909021457AAdLwFk